The lung of the common toad, Bufo arenarum (Anura: Bufonidae). A light and electron microscopy study
The present study describes the lung morphology of the common toad, Bufo arenarum, as observed by light and electron microscopy. The lung wall consists of four layers: mesothelium, dense connective tissue with thin elastic fibers, loose connective tissue containing smooth muscle fibers and an intern...
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1998
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279545_v22_n1_p19_Hermida http://hdl.handle.net/20.500.12110/paper_03279545_v22_n1_p19_Hermida |
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paper:paper_03279545_v22_n1_p19_Hermida2023-06-08T15:33:37Z The lung of the common toad, Bufo arenarum (Anura: Bufonidae). A light and electron microscopy study Amphibia Lung Morphology Pneumocyte Ultrastructure animal cell animal tissue apical membrane article cell organelle connective tissue elastic fiber electron microscopy goblet cell lung lung alveolus cell lung gas exchange mesothelium microscopy microvillus nonhuman respiratory epithelium smooth muscle fiber toad Animals Bufo arenarum Lung Microscopy, Electron Respiratory Mucosa Amphibia Animalia Anura Bufo arenarum Bufonidae Vertebrata The present study describes the lung morphology of the common toad, Bufo arenarum, as observed by light and electron microscopy. The lung wall consists of four layers: mesothelium, dense connective tissue with thin elastic fibers, loose connective tissue containing smooth muscle fibers and an internal respiratory epithelium. The lung presents three types of folds defined by their epithelia. First order folds are coated by ciliated epithelium containing numerous goblet cells. Second order folds present the same type of epithelium but devoid of goblet cells, while third order folds are only lined by respiratory epithelium. The respiratory surface of the lung is lined by a single cell type, the pneumocyte, which presents characteristics of both type I and type II alveolar cells of higher vertebrates. The pneumocytes are prismatic in shape and possess attenuated cytoplasmatic processes which spread over the pulmonary capillaries to form the outer layer of the air-blood barrier. These cells present microvilli in the apical extreme and contain different types of cytoplasmic bodies: electron dense, multivesicular and lamellar. 1998 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279545_v22_n1_p19_Hermida http://hdl.handle.net/20.500.12110/paper_03279545_v22_n1_p19_Hermida |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Amphibia Lung Morphology Pneumocyte Ultrastructure animal cell animal tissue apical membrane article cell organelle connective tissue elastic fiber electron microscopy goblet cell lung lung alveolus cell lung gas exchange mesothelium microscopy microvillus nonhuman respiratory epithelium smooth muscle fiber toad Animals Bufo arenarum Lung Microscopy, Electron Respiratory Mucosa Amphibia Animalia Anura Bufo arenarum Bufonidae Vertebrata |
| spellingShingle |
Amphibia Lung Morphology Pneumocyte Ultrastructure animal cell animal tissue apical membrane article cell organelle connective tissue elastic fiber electron microscopy goblet cell lung lung alveolus cell lung gas exchange mesothelium microscopy microvillus nonhuman respiratory epithelium smooth muscle fiber toad Animals Bufo arenarum Lung Microscopy, Electron Respiratory Mucosa Amphibia Animalia Anura Bufo arenarum Bufonidae Vertebrata The lung of the common toad, Bufo arenarum (Anura: Bufonidae). A light and electron microscopy study |
| topic_facet |
Amphibia Lung Morphology Pneumocyte Ultrastructure animal cell animal tissue apical membrane article cell organelle connective tissue elastic fiber electron microscopy goblet cell lung lung alveolus cell lung gas exchange mesothelium microscopy microvillus nonhuman respiratory epithelium smooth muscle fiber toad Animals Bufo arenarum Lung Microscopy, Electron Respiratory Mucosa Amphibia Animalia Anura Bufo arenarum Bufonidae Vertebrata |
| description |
The present study describes the lung morphology of the common toad, Bufo arenarum, as observed by light and electron microscopy. The lung wall consists of four layers: mesothelium, dense connective tissue with thin elastic fibers, loose connective tissue containing smooth muscle fibers and an internal respiratory epithelium. The lung presents three types of folds defined by their epithelia. First order folds are coated by ciliated epithelium containing numerous goblet cells. Second order folds present the same type of epithelium but devoid of goblet cells, while third order folds are only lined by respiratory epithelium. The respiratory surface of the lung is lined by a single cell type, the pneumocyte, which presents characteristics of both type I and type II alveolar cells of higher vertebrates. The pneumocytes are prismatic in shape and possess attenuated cytoplasmatic processes which spread over the pulmonary capillaries to form the outer layer of the air-blood barrier. These cells present microvilli in the apical extreme and contain different types of cytoplasmic bodies: electron dense, multivesicular and lamellar. |
| title |
The lung of the common toad, Bufo arenarum (Anura: Bufonidae). A light and electron microscopy study |
| title_short |
The lung of the common toad, Bufo arenarum (Anura: Bufonidae). A light and electron microscopy study |
| title_full |
The lung of the common toad, Bufo arenarum (Anura: Bufonidae). A light and electron microscopy study |
| title_fullStr |
The lung of the common toad, Bufo arenarum (Anura: Bufonidae). A light and electron microscopy study |
| title_full_unstemmed |
The lung of the common toad, Bufo arenarum (Anura: Bufonidae). A light and electron microscopy study |
| title_sort |
lung of the common toad, bufo arenarum (anura: bufonidae). a light and electron microscopy study |
| publishDate |
1998 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279545_v22_n1_p19_Hermida http://hdl.handle.net/20.500.12110/paper_03279545_v22_n1_p19_Hermida |
| _version_ |
1768544274948816896 |